Form 4 for WLK WESTLAKE CORP
Accepted 2025-10-03 00:00:00 ET · period of report 2025-10-01 · accession 0001193125-25-229590 · SEC index · Original document
Summary rows
Aggregated the way they appear in lists: one row per insider, transaction code and security table.
| X | Filed | Traded | Ticker | Insider | Title | Type | Price | Qty | Owned | ΔOwn | Value |
|---|---|---|---|---|---|---|---|---|---|---|---|
| D | 2025-10-03 | 2025-10-02 | WLK | Szwejbka Scott Thomas | SVP, HIP Segment Head | F - Tax | $76.70 | -3,842 | 12.8K | -23% | -$294.7K |
| D | 2025-10-03 | 2025-10-01 | WLK | Szwejbka Scott Thomas | SVP, HIP Segment Head | M - OptEx | $0.00 | +10.8K | 16.7K | +186% | $0 |
| D | 2025-10-03 | 2025-10-01 | WLK | Szwejbka Scott Thomas | SVP, HIP Segment Head | M - OptEx | $0.00 | -10.8K | 0 | -100% | $0 |
Purchase Sale Sale after option exercise All abbreviations
Every reported transaction
| # | Table | Security | Date | Code | A/D | Shares | Price | Owned after | Own | Exercise / expiry | Underlying | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | Common | Common Stock | 2025-10-02 | F | D | 3,842 | $76.70 | 12,817 | D | — | — | (F3) Shares otherwise issuable were withheld to satisfy tax obligations arising out of the vesting of the reporting persons RSUs. |
| 2 | Common | Common Stock | 2025-10-01 | M | A | 10,840 | $0.00 | 16,659 | D | — | — | (F1) Restricted stock units ("RSUs") convert into the Issuer's common stock on a one-for-one basis. |
| 3 | Derivative | Restricted Stock Units | 2025-10-01 | M | D | 10,840 | $0.00 | 0 | D | — · — to — | 10,840 Common Stock | (F1) Restricted stock units ("RSUs") convert into the Issuer's common stock on a one-for-one basis. (F2) On October 1, 2021, the reporting person was granted 10,840 RSUs vesting on the fourth anniversay of the grant date. |